Photographic-printing machine.



PATENTE D FEB. 28, 1905.

W. T. MEAD. PHOTOGRAPHIG PRINTING MACHINE.

APPLICATION FILED DEC. 10. 1904 2 SHEETS-SHEET l.

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No. 788,639. PATENTED FEB.28, 1905. W. T. MEAD.

PHOTOGRAPHIG PRINTING MACHINE.

APPLICATION FILED 1330.10. 1904 2 SHEETS-SHEBT 2.

Z/IJZIZeJJQJJ I 7, fnvenZor. 1 \J a 6 (Cr/ N fag W J UNITED STATESPatented liebruary 28, 1905.

WILLARD T. MEAD, OF BUFFALO, NEWV YORK.

PHOTOGRAPHlC-PRINTING IVIACHlNE.

SPEGIFICATIONforming part of Letters Patent No. 783,639, dated February28, 1905.

Application filed December 10, 1904. Serial No. 236,261.

To (ti/Z 11/71/0171, it ntay c0n0c7'n:

Be it known that LVVILLARD T. MEAD, a citizen of the United States,residing at Buffalo, in the county of Erie and State of New York, haveinvented a new and useful Improvement in Photographic-Printing Machines,of which the following is a specification.

This invention relates to photographicprinting machines of that kindcomprising a rotatable drum having a transparent peripheral wall and anenveloping curtain, between which the sensitized print paper or sheetand tracing or transparent original are introduced and subjected for aperiod of time to the ac tion of light within the drum to produce theprint.

The invention is especially directed to machines for making blue-printsfrom tracings, but is not limited to such use.

The primary object of the invention is to provide an efficient practicalphotographicprinting machine of simple and inexpensive constructionwhich can be fed or charged with rapidity and ease and discharged withequal facility.

In the accompanying drawings, consisting of two sheets, Figure 1 is aside elevation of a photographic-printing machine embodying theinvention. Fig. 2 is a transverse sectional elevation thereof. Fig. 3 isa longitudinal sectional elevation thereof. Fig. 4 is a side elevationof a modified construction.

Like letters of reference refer to like parts in the several figures.

A represents a. stationary frame, which may be of any suitable form andconstruction, that shown consisting of connected sides having uprightbearing extensions (1 for the rotatable drum and forwardly-mojcctingarms or extensions a.

B represents the drum or cylinder, which preferably consists of twocircular skeleton ends or heads I), which support and are connected bysegmental cylindrical plates 0 of glass or other suitable transparentmaterial. The heads of the drum are connected between the glass platesby bars or strips 0, which constitute supports for the longitudinaledges of the glass plates. A drum having a con tinuous cylindrical glasswall could be employed; but such construction is more expensive thanthat described, which is strong and desirable for ordinary work whereexcessively large prints are not required. A cylindrical drum ispreferred; but a polygonal drum could be used. The drum is mounted torotate about a horizontal axis in any suitable man n er. For instance,it is supported on fixed journals (Z, projecting inwardly from thebearing extensions a of the stationary frame, and it is turned bysuitable means, the ends of the drum being provided with circular handrails for this purpose. Any other means for turning the drum can beused.

F represents lamps which are located within the drum and furnish thelight for printing. The electric lamps shown in the drawings are carriedby a supporting bar or frame 7", secured to the inner ends of thestationary journals for the drum, and they are supplied with current bywires entering the drum through one of its journals or in any otherknown way. One or more lamps are employed, as may be found necessary.

Gr represents a curtain or apron, of thin flexible material, which isattached at one end to and is wound upon a roller H, arranged parallelto the drum, and is attached at its other or free end at it to thecylindrical wall of the drum B. The curtain-roller II is journaled infixed relation to the drum in suitable bearings /1.' on the frame A andis provided with means for revolving it in a direction to wind thecurtain thereon. A spring-operated roller,- such as the well-knownwindow-slnule roller, can be used and is shown in Figs. 1 and 3. or theroller can be revolved to wind up the curtain by other means, such as aweight-motor H. (Shown in Fig. 4E.) \Vhen the drum B is turnedforwardly, as indicated by the arrows, Figs. 1 and 3, the curtain (i isunwound from its roller and wrapped around the drum, the spring orweight for the curtain-roller being thus wound up. and when the drum isturned backwardly the roller H automaticall y rewinds the curtainthereon. The automatically-winding roller H always exerts a suflicientpull on the curtain to draw it taut around the drum, and thereby holdthe tracings and print-paper securely against the transparent ioo wallol the th-umand prevent thedisplacement and more reliable than it avertical cylinder of the same.

in the machine shown in Figs. 1 to 3 the curtain-roller is yournaled inthe tor\vardly and curtain were employed. l claim as my invention W l.The combinationot'a rotatable drumhav- 5 projecting arms m ol the frame,and the curing atransparent peripheral portion, a source 5 tainextendstherefrom in a substantially horiof light within the drum, acurtain attached at zontal direction to the drum, passing over 2 one endto said drum, and a roller to which the guide and supporting rollerwhich holds otherend ot'said curtain is attached,and which the curtainup against the cyliinlrical wall of is rotated in fixed relation to thedrum to wind 10 the drum. 'llhe guide-roller at all timesholds saidcurtain thereon,substantially as set forth. 7

the curtain against the peripheral lace ol the 2. The ctnnlnnationotarotatabled rum havdrum, and while the curtain-roller itself could ing atransparent peripheral portion, a source be located at the placeoccupied by the guideof light within the drum, a roller iournaled inroller and the latter dispensed with, as illusliXed relation to thedrum, a curtain attached 5 trated in Fig. i, in which H re 'iresents theto said drum and to said roller and whichis 75 cin'taii'i-roller, sucharrai'igement is not so 1 unwound from said roller by the rotation 01desirable, because the curtain-roll decreases t the drum in onedirection, and means for rein diameter as the curtain is unwoundtherevolvingsaid roller t0 rewind thecurtain therefrom and the curtainmay not at all times be on when the drum is rotated in the opposite heldlirmly against the drum. The guidedirection, substantially as set torth.8o roller .l is preterably pressed ,\ieldin$ 1,'l.\ i 3. Thecombinatioi'i ot a rotatal)ledrumhavagainst the drum 'by springs beneathits i inga transparentperipheral portion, a source journals, so as tohold the curtain tightly o1" light within the drum, a curtain attachedagainst the drum and prevent injury to the at one end to the drum andadapted toenvehip 5 latter in case a hard object should be carried thedrum when the latter is rotated in one di- 8 between the guide-rollerand the drum by the rection, a guide-roller over which the curtaincurtain. A horizontal teed-board li, suppasses, and meanstormaintaiiiing the curtain ported by the frame-arms 1/ in trout ot' thetaut at all times, substantially asset lorth. curtain -rollcr H, ispreferably employed. 4t. The combination ol a rotatabledrumhav- 3 which,together with the horizontal portion ing a transparentperipheralportion, a source 0 ot' the curtain, forms a horizontal teed-table otlight within the drum, a roller journaled in on which to place thetracings and print-pzwer iixed relation to the drum, a curtain attachedwhen feeding the machine. to said roller and to the drum, means forwindlhe drum can be held against backward roing the curtain on theroller, and a roller tation by the pull of the curtain, by a ratchetwhich presses the curtain against the periph- 95 and pawl Jig. 1, or byany other device. cry of the drum, substantially as set forth.

in operation the tracings and print-paper 'lhecoml)ination ot'ahorizontal rotatable are placed in proper relation on the horizondrumhaving atransparentperipheral portion, tal teed-table and the drum 8rotated 'lor- 1 asourceotlight within thedrum, a horizontal 40 wardly.As the drum and curtain (1 move in teed-board, a roller journaledadjacent tosaid 10 the same direction the tracings andprintteed-board,andacurtainattachedtosaid roller paper will be grippedand carried in between and extending in asubstantially horizontal dithedrum and curtain and tirmly held by the 1 rection toward and attached tothe drum, sublatt against thedrum. A single large tracstantially as setforth.

ing and printer several small ones can be t'ed 6. l,hecombinationolahorizontalrotatable I05 into the machine to rest on each glass plateol 1 drum havingatransparent peripheral portion, the drum. Yl'hen thedrum is charged, the i a source of lightwithin the drum, ahorizontallamps F are lighted and the drum allowed to I roller journaled in lixedrelation in lrontol' the stand stationary until the printing isetlected, i drum, a curtain attached to said roller and exalter-whichthe pawl is tripped and drum i tending inasubstantiallyhorizontaldirection H0 turned in the reverse direction or bacl \vardl Thecurtain-roller ll rewiuds the curtain H thereon, and the tracings andprints are discharged onto the teed-table.

ts the leetttable. curtain, and drum are horizontal, the machine can bereadily charged with a number ol small tracings and printol thembeingdisplaced, and thus spoiled. lhe

machine is theret'ore .much easier to operate toward and attached to thedrum, and a roller t'or holding the curtain against the periphery ot'the drum, substantially as set l'orth.

\Vitness my hand this Tth day 01 l,)ecem|n r, liltlt.

TILL/X hi) 'I. M EA 1 \l'itnesses:

tlnantns \V. PARKER, Enwam) U. Haul).

